gcc/ada/interfac.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                           I N T E R F A C E S                            --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 2002-2003 Free Software Foundation, Inc.          --
  10 --                                                                          --
  11 -- This specification is derived from the Ada Reference Manual for use with --
  12 -- GNAT. The copyright notice above, and the license provisions that follow --
  13 -- apply solely to the implementation dependent additions to thie file.     --
  14 --                                                                          --
  15 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  16 -- terms of the  GNU General Public License as published  by the Free Soft- --
  17 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  18 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  19 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  20 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  21 -- for  more details.  You should have  received  a copy of the GNU General --
  22 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  23 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  24 -- MA 02111-1307, USA.                                                      --
  25 --                                                                          --
  26 -- As a special exception,  if other files  instantiate  generics from this --
  27 -- unit, or you link  this unit with other files  to produce an executable, --
  28 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  29 -- covered  by the  GNU  General  Public  License.  This exception does not --
  30 -- however invalidate  any other reasons why  the executable file  might be --
  31 -- covered by the  GNU Public License.                                      --
  32 --                                                                          --
  33 -- GNAT was originally developed  by the GNAT team at  New York University. --
  34 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  35 --                                                                          --
  36 ------------------------------------------------------------------------------
  37
  38 --  Assumes integer sizes of 8, 16, 32 and 64 are available, and that the
  39 --  floating-point formats are IEEE compatible.
  40
  41 --  Note: There is a specialized version of this package for OpenVMS.
  42
  43 package Interfaces is
  44 pragma Pure (Interfaces);
  45
  46    type Integer_8  is range -2 **  7 .. 2 **  7 - 1;
  47    for Integer_8'Size use  8;
  48
  49    type Integer_16 is range -2 ** 15 .. 2 ** 15 - 1;
  50    for Integer_16'Size use 16;
  51
  52    type Integer_32 is range -2 ** 31 .. 2 ** 31 - 1;
  53    for Integer_32'Size use 32;
  54
  55    type Integer_64 is range -2 ** 63 .. 2 ** 63 - 1;
  56    for Integer_64'Size use 64;
  57
  58    type Unsigned_8  is mod 2 **  8;
  59    for Unsigned_8'Size use  8;
  60
  61    type Unsigned_16 is mod 2 ** 16;
  62    for Unsigned_16'Size use 16;
  63
  64    type Unsigned_32 is mod 2 ** 32;
  65    for Unsigned_32'Size use 32;
  66
  67    type Unsigned_64 is mod 2 ** 64;
  68    for Unsigned_64'Size use 64;
  69
  70    function Shift_Left
  71      (Value  : Unsigned_8;
  72       Amount : Natural)
  73       return   Unsigned_8;
  74
  75    function Shift_Right
  76      (Value  : Unsigned_8;
  77       Amount : Natural)
  78       return   Unsigned_8;
  79
  80    function Shift_Right_Arithmetic
  81      (Value  : Unsigned_8;
  82       Amount : Natural)
  83       return   Unsigned_8;
  84
  85    function Rotate_Left
  86      (Value  : Unsigned_8;
  87       Amount : Natural)
  88       return   Unsigned_8;
  89
  90    function Rotate_Right
  91      (Value  : Unsigned_8;
  92       Amount : Natural)
  93       return   Unsigned_8;
  94
  95    function Shift_Left
  96      (Value  : Unsigned_16;
  97       Amount : Natural)
  98      return    Unsigned_16;
  99
 100    function Shift_Right
 101      (Value  : Unsigned_16;
 102       Amount : Natural)
 103       return   Unsigned_16;
 104
 105    function Shift_Right_Arithmetic
 106      (Value  : Unsigned_16;
 107       Amount : Natural)
 108       return   Unsigned_16;
 109
 110    function Rotate_Left
 111      (Value  : Unsigned_16;
 112       Amount : Natural)
 113       return   Unsigned_16;
 114
 115    function Rotate_Right
 116      (Value  : Unsigned_16;
 117       Amount : Natural)
 118       return   Unsigned_16;
 119
 120    function Shift_Left
 121      (Value  : Unsigned_32;
 122       Amount : Natural)
 123      return    Unsigned_32;
 124
 125    function Shift_Right
 126      (Value  : Unsigned_32;
 127       Amount : Natural)
 128       return   Unsigned_32;
 129
 130    function Shift_Right_Arithmetic
 131      (Value  : Unsigned_32;
 132       Amount : Natural)
 133       return   Unsigned_32;
 134
 135    function Rotate_Left
 136      (Value  : Unsigned_32;
 137       Amount : Natural)
 138       return   Unsigned_32;
 139
 140    function Rotate_Right
 141      (Value  : Unsigned_32;
 142       Amount : Natural)
 143       return   Unsigned_32;
 144
 145    function Shift_Left
 146      (Value  : Unsigned_64;
 147       Amount : Natural)
 148      return    Unsigned_64;
 149
 150    function Shift_Right
 151      (Value  : Unsigned_64;
 152       Amount : Natural)
 153       return   Unsigned_64;
 154
 155    function Shift_Right_Arithmetic
 156      (Value  : Unsigned_64;
 157       Amount : Natural)
 158       return   Unsigned_64;
 159
 160    function Rotate_Left
 161      (Value  : Unsigned_64;
 162       Amount : Natural)
 163       return   Unsigned_64;
 164
 165    function Rotate_Right
 166      (Value  : Unsigned_64;
 167       Amount : Natural)
 168       return   Unsigned_64;
 169
 170    pragma Import (Intrinsic, Shift_Left);
 171    pragma Import (Intrinsic, Shift_Right);
 172    pragma Import (Intrinsic, Shift_Right_Arithmetic);
 173    pragma Import (Intrinsic, Rotate_Left);
 174    pragma Import (Intrinsic, Rotate_Right);
 175
 176    --  Floating point types. We assume that we are on an IEEE machine, and
 177    --  that the types Short_Float and Long_Float in Standard refer to the
 178    --  32-bit short and 64-bit long IEEE forms. Furthermore, if there is
 179    --  an extended float, we assume that it is available as Long_Long_Float.
 180    --  Note: it is harmless, and explicitly permitted, to include additional
 181    --  types in interfaces, so it is not wrong to have IEEE_Extended_Float
 182    --  defined even if the extended format is not available.
 183
 184    type IEEE_Float_32       is new Short_Float;
 185    type IEEE_Float_64       is new Long_Float;
 186    type IEEE_Extended_Float is new Long_Long_Float;
 187
 188 end Interfaces;